These are the homemade machines that you"ve dreamed of building, from the high-voltage Night Lighter 36 spud gun to the Jam Jar Jet, the Marshmallow Shooter, and the Yagua Blowgun. Including detailed diagrams and supply lists, Gurstelle"s simple, step-by-step instructions help workshop warriors at any skill level achieve impressively powerful results. With Whoosh Boom Splat, you can build: The Jam Jar Jet - the simple pulse jet engine that roars; The Elastic Zip Cannon - a membrane-powered shooter that packs a wallop; The Mechanical Toe - a bungee-powered kicking machine; The Vortex Launcher - a projectile shooter that uses air bullets for ammunition; The Clothespin Snap Shooter - the PG-17 version of a clothespin gun that fires fiery projectiles; The Architronito - the steam-powered cannon conceived by Leonardo da Vinci and many more!